Meet our team
Eric Diaz - Founder and Director
Formerly Davis Cup Player, 2 NCAA Final Four Team Appearances, 3 Top-five National Team Rankings Founder and director of Tier1-IBG tennis Academy. Coach of Alex Michelson and Learner Tien.
Jason Leavitt - Founder and Director
Former US Tennis Federation National Coach, Former ATP coach of Jason Jung ( career high of ATP 118),Former WTA coach of Ashley Kratzer (WTA 117) , Founder and director of Tier1-IBG Academy. Coach of Learner Tien and Alex Michelson.
Victor Castro - Coach
Victor Castro is a former top-ranked junior and collegiate tennis player with a decorated playing and coaching background. As a junior, he captured over 15 national titles and represented Brazil in South American team competitions. He continued his success at Cerritos College and San Diego State University, earning multiple All-Mountain West Doubles selections and ranking in the NCAA Top 100 in doubles. Now a dedicated coach and mentor, Victor brings experience from both high school and collegiate coaching, with a strong focus on player development, mental toughness, and strategic growth.
Jwany Sherif - Coach
Jwany Sherif is a former professional tennis player with WTA points and victories over top 200 ranked WTA players, achieving a career-high UTR of 11 and a national junior ranking of 3. With extensive coaching experience at Advantage Tennis Academy and Barnes Tennis Academy, Jwany has worked alongside tennis legend Nick Bollettieri. Specializing in personalized coaching, Jwany excels in developing technical skills, mental discipline, and fitness for students of all levels, creating tailored lesson plans to foster individual growth and match-play success.
Konstantin Kravchuk - Coach
Former professional tennis player with a career-high ATP ranking of No. 78 and a key member of the Russian National Tennis Team. Extensive experience as a professional coach, having worked with numerous ATP and WTA players.
Steven Shi - Founder
Tennis Promoter and Investor
Eliot Teltscher - Senior Coach Consultant
Former U.S. National Team Coach, Personal Coach for Pete Sampras and other former ATP & WTA ranked top-20 players. Former USTA Director of High-Performance-Tennis, Formerly Ranked 6 thru 15 for over 5 years on ATP Tour, Winner of 10 Grand Prix Titles and Winner of French Open mixed doubles.
Johnny Chang - Programs Director
James Liang - Programs Director
About Our Coaching Team
Introducing our High Performance Tennis Coaching Team, a dedicated group of elite professionals committed to developing the full potential of every athlete. Our team brings a diverse range of experiences from the highest levels of the sport, including former ATP and WTA players, renowned fitness experts, and tactical strategists. Each coach is selected for their expertise in specific areas of tennis, ensuring a comprehensive approach to training, mental toughness, and strategic play. We focus on personalized coaching, tailored to fit the unique strengths and needs of each player, aiming to optimize performance both on and off the court. Our goal is not only to improve skills and techniques but also to instill a lifelong passion for the game, cultivating resilience, discipline, and sportsmanship. Join us to elevate your game to championship levels under the guidance of our top-tier coaching team.
Welcome to Tier1-IBG, a high-performance Tennis academy located in the United States. Our mission is to provide top-notch training and coaching to aspiring tennis players of all levels.
With a team of experienced coaches and state-of-the-art facilities, we are dedicated to helping our students reach their full potential and achieve success both on and off the court. Join us and take your game to the next level!
Elevate Your Tennis Skills
Contact Our Team We're located in Los Cab Sports Village, Fountain Valley, CA Have questions? Email us at: [email protected]. We are here to help you with all your tennis training needs.